Anyone do Fuji. Instax guestbook??

I love the idea of doing a fujifilm instax guestbook for my wedding. I find the traditional wedding guestbook impersonal and I don’t want want to look back in 10 years and look at signatures. I don’t think a photobooth fits the formality of my wedding and it costs a min. of $450 for just the cocktail hour.

Do any of you have experience with the instax and how many photos you bought per guest? What if a guest doesn’t like their first picture? I don’t want to run out but I don’t want to buy like 3 per guest either , that will get waaay expensive.